The phase diagram of a mixed halide (Br, I) hybrid perovskite obtained by synchrotron X-ray diffraction.

ABSTRACT: By using synchrotron X-ray powder diffraction, the temperature dependent phase diagram of the hybrid perovskite tri-halide compounds, methyl ammonium lead iodide (MAPbI₃, MA⁺ = CH₃NH₃ ⁺) and methyl ammonium lead bromide (MAPbBr₃), as well as of their solid solutions, has been established. The existence of a large miscibility gap between 0.29 ≤ x ≤ 0.92 (±0.02) for the MAPb(I_1-x Br _x )₃ solid solution has been proven. A systematic study of the lattice parameters for the solid solution series at room temperature revealed distinct deviations from Vegard's law. Furthermore, temperature dependent measurements showed that a strong temperature dependency of lattice parameters fr

SUBMITTER: Lehmann F 

PROVIDER: S-EPMC9063018 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature